high-end VFD screw air compressor

high-end VFD screw air compressor：

According to the energy-saving performance of VFD air compressor at startup, operation and constant pressure condition：
Now 37 kw variable frequency compressor, for example, save electricity measurement under 70% load condition. (PS: In general, users will consider the appropriate allowance and upgrade the needs of the maximum gas, so most users actually use volume is only 70% of the rated gas production unit) If working for 8000 hours a year, and 1.0 yuan/Kw•h, a VFD screw compressor can save A+B=68960 yuan/year（about $11300）
A. Unloading cost:30% unloading hours×unloading electric waste×total runing hours×electric rates